Pinpoint Test AJ: DTC U0151:00

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

AJ1 CHECK FOR LOST COMMUNICATION DTCs
- Ignition ON.
- Clear continuous DTCs from all modules.
- Ignition OFF.
- Ignition ON.
- Wait at least 10 seconds.
- Retrieve all continuous DTCs from all modules.
- Is DTC U0151 or DTC U0151:00 set in any modules?
- Yes: GO to AJ2 .
- No: The system is operating correctly at this time. The DTC may have been set due to an intermittent fault in the network wiring.
AJ2 CHECK FOR BATTERY VOLTAGE OUT-OF-RANGE DTCs
- Carry out the self-test for the following modules:
  - APIM
  - PCM
  - RCM
  - Instrument Cluster (IC)
- Is DTC B1317, B1318, U3003:16 or U3003:17 recorded in any module?
- Yes: For the APIM , REFER to DTC CHARTS .
  For all other modules, REFER to the Diagnostic Trouble Code (DTC) Chart in MULTIFUNCTION ELECTRONIC MODULES .
- No: GO to AJ3 .
AJ3 CHECK FOR DTC U0151 OR DTC U0151:00 SET IN MULTIPLE MODULES
- Review the recorded results from the self-test.
- Is DTC U0151 or DTC U0151:00 set in more than one module?
- Yes: GO to AJ4 .
- No: If there is an observable audio system symptom, GO to SYMPTOM CHART - GENERAL AUDIO SYSTEM to diagnose the observed symptom.
  If there is an observable restraints system symptom, REFER to DIAGNOSIS AND TESTING to diagnose the symptom.
  
  If there is no observable symptom, CHECK the wiring between the APIM and the RCM for an intermittent fault.
AJ4 CHECK FOR CORRECT RCM OPERATION
- Disconnect all the RCM connectors.
- Check for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Connect all the RCM connectors and make sure they seat correctly.
- Is the concern still present?
- Yes: INSTALL a new RCM. REFER to RESTRAINTS CONTROL MODULE (RCM) . CLEAR all continuous DTCs. REPEAT the APIM self-test.
- No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR all continuous DTCs. REPEAT the APIM self-test.